Answer: 2:1
Explanation:
Given
Mother has four times the mass of young son
If they possess same kinetic energy then
Equate the energy
Thus, the ratio of speed is 2:1.
Answer:
19 cm³
Explanation:
The coefficient of thermal expansion is the ratio of the change in volume to the reference volume for each degree change in temperature. Hence the change in volume is found by multiplying by the reference volume and the change in temperature.
(1000 cm³)(0.950·10⁻³/K)(50-30)K = 19 cm³ . . . volume increase
Answer:
Its acceleration is certainly negative.
Explanation:
- When an object moving in a straight line decelerates then its velocity certainly decreases.
- Its acceleration is certainly negative.
- As we know that acceleration is the rate of change in velocity and the object is decelerating i.e. its velocity is reducing with time.
where:
are final and initial velocities of the object
are final and initial time of observation.
- Its SI unit is
Igneous intrusions form when magma cools and solidifies before it can reach the surface. An extrusion consists of extrusive rock; which forms above the surface of the crust.
The answer for question 2 i guess it’s c